ORIGINAL CONVEYING DEVICE

• Main Author: YAMAUCHI MASAYUKI
• Format: Patent
• Language: English
• Published: 27.04.1984
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; CONVEYING; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; HOLOGRAPHY; MAGNETOGRAPHY; PACKING; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; STORING; TRANSPORTING

PURPOSE:To convey an original to a projection position securely even when conditions which exert influence upon original conveyance such as environmental conditions change, by measuring the time of original conveyance in a specific conveyance area by a belt and correcting the original conveyance conditions of the belt. CONSTITUTION:A test form 20 is set at a paper feed part 19 before an original 2 in a tray 1 is copied and when the 3rd sensor 21 detects that, an original feed mode is changed into a test mode. When the front end of the test form 20 is detected by the 1st sensor 14, a driving motor 12 rotates and the test form 20 is conveyed by the belt 7 and discharged to a paper discharge tray 17. At this time, the conveyance time of the test form 20 between the detection of the front end by the 1st sensor 14 and the detection of the rear end by the 2nd sensor 18 is measured by counting pulses from an encoder 15. The time of conveyance of the original 2 up to the projection position by the belt 7 varies according to environmental conditions, the friction factor of the original 2, paper thickness, etc., in the conveyance, so the set value of time when a driving motor 12 is driven is corrected on the basis of the conveyance time of the test form 20 when the original 2 is set.